CVE-2023-52740

Local system crash via interrupt-exit mitigation race

Published May 21, 2024 · Updated May 11, 2026

Race condition in the PowerPC 64-bit interrupt-exit path in Linux 5.14 through 6.2-rc7 allows local users to crash the system. The path tests interrupt_exit_not_reentrant twice and can restore MSR[EE|RI] from inconsistent branch states, corrupting the MSR and IRQ soft-mask state. Reachability requires a PowerPC 64-bit kernel, concurrent RFI or STF mitigation switching, and a pending soft-masked interrupt.

CVSS severity4.7
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the PowerPC 64-bit interrupt-exit path in Linux 5.14 through 6.2-rc7 allows local users to crash the system. The path tests interrupt_exit_not_reentrant twice and can restore MSR[EE|RI] from inconsistent branch states, corrupting the MSR and IRQ soft-mask state. Reachability requires a PowerPC 64-bit kernel, concurrent RFI or STF mitigation switching, and a pending soft-masked interrupt.

The record

CVE
CVE-2023-52740
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=13799748b957bc5659f97c036224b0f4b42172e2 <2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1
  2. Affected versionversion=13799748b957bc5659f97c036224b0f4b42172e2 <6f097c24815e67909a1fcc2c605586d02babd673
  3. Affected versionversion=13799748b957bc5659f97c036224b0f4b42172e2 <86f7e423933608d536015a0f2eb9e0338c1227e0
  4. Affected versionversion=5.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=13799748b957bc5659f97c036224b0f4b42172e2 <2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1; version=13799748b957bc5659f97c036224b0f4b42172e2 <6f097c24815e67909a1fcc2c605586d02babd673; version=13799748b957bc5659f97c036224b0f4b42172e2 <86f7e423933608d536015a0f2eb9e0338c1227e0; version=5.14

Published CVSS scores

4.7Canonical UbuntuCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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